Driver guard for fastening inserting machines



Dec. 7, 1948.

' R. HrLAwsoN 2,455,371 DRIVER GUARD FOR FASTENING INSERTING MACHINES Original Filed March 14, 1945 3 Sheets-Sheet l A90 we Robert h La u/son 5/? Dec. '7, 1948. R. H. LAWSON 2,455,371

I DRIVER GUARD FOR FASTENING INSERTING MACHINES Original Filed Mardh 14, 1945 3 Sheets-Sheet 2 [n vemor POberf H Lawson 5 hi; Affor'ney Dec. 7, 1948. R. H. LAWSON 2,455,371

I DRIVER GUARD FOR FASTENING INSERTING MACHINES Original Filed March 14, 1945 3 Sheets-Sheet 3 82 330 {.332 w 5 K 330 V3 a E E 84 $1 in van for Faber! H Lawson By is Afforney Patented Dec. 7, 1948 DRIVER, GUARD FOR FASTENING INSERTING MACHINES Robert H. Lawson, Beverly, Mass., assignor to United Shoe Machinery Corporation, Flemington, N. J a corporation of New Jersey Original application March 14, 1945, Serial No. 582,647. Divided and this application April 6, 1946, Serial No. 660,169

'7 Claims.

This invention relates to fastening inserting machines and is herein illustrated as applied to a machine of the type disclosed in an application for Leters Patent of the United Staes, Serial No. 582,647, filed March 14, 1945, of which the present application is a division.

Machines of the above mentioned type are particularly adapted to insert fastenings comprising straight pieces of fastening material, such as wire, endwise into the work parts in such a manner that each fastening, during its insertion, is bent by a deflector to follow a curved path in the work without penetrating the entire thickness thereof. In driving a thin piece of wire endwise it is necessary to employ a thin driver having substantially the same gage as the wire thus enabling the wire, during the driving movement, to be supported from all sides. However, it is obvious that the driver also must be supported from all sides and this presents difiiculties since the rear end of the driver is attached to driver actuating mechanism Which, of necessity, is considerably thicker and wider than the cross section of the driver and, therefore, requires a larger passage or guideway to accommodate its movement. In the illustrated construction the driver moves in a socalled throat member containing the fastenings to be inserted and the driver passage is bridged over by a cover. However, this cover necessarily must have a large recess to accommodate the driver actuating mechanism, thus leaving the driver or, at least, a portion thereof exposed during its reciprocation.

Therefore, the invention provides a guard member for the driver which is so arranged that it is moved concomitantly with the driver to cover the exposed portions of the driver and to prevent buckling of the driver during its operative stroke. In the illustrated embodiment of the invention the driver guard member has an angular motion about a fixed pivot and different portions of the driver guard are active at different times to cover the driver. Since the different active portions of the driver guard are located at different distances from the center of rotation of the driver guard, they would move at different speeds such as would be undesirable for the accomplishment of the intended purpose of effectively covering the driver at all times and in any position it assumes during its reciprocation. Accordingly, there is provided means for so controlling the rate of movement of the guard member as to render it effective for the intended purpose.

These and other features of the invention will now be described in detail with reference to the accompanying drawings and will be pointed out in the appended claims.

In the drawings,

Fig. 1 is a view in right hand side elevation of the principal parts of a machine embodying the present invention, with certain parts of the machine broken away;

Fig. 2 is a view in right hand side elevation of driver operating mechanism with which the machine illustrated in Fig. 1 is provided;

Fig. 3 is a detail view of the throat member, including the driver and the driver guard;

Fig. 4 is a sectional view taken along the line IV-IV of Fig. 3;

Fig. 5 is a sectional view taken along the line V-V of Fig. 3;

Fig. 6 is a detail view similar to Fig. 3 with a workpiece presented to the operating instrumentalities of the machine.

The illustrated machine is particularly adapted for use in lasting the upper U of a welt shoe and progressively securing the marginal portion of the upper U to the rib of an insole I on a last L by fastenings. Preferably each fastening comprises a straight piece of fastening material, such as wire, inserted endwise through the marginal portion of the upper and the insole rib. The leading end portion of the fastening after having penetrated the insole rib is deflected and is caused to reenter the work and finally to emerge from the other side of the insole rib where it is turned back into the rib. It is to be pointed out, however, that-the invention is by no means limited in its utility to the insertion of fastenings of the type referred to into shoe parts of the aforementioned type or shoe parts in general.

The general organization 01 the machine The principal operating instrumentalities of the machine and their actuating mechanisms are contained in or secured to a box-like frame 20 (Figs. 1 and 2) which is adapted to rest on a support (not shown). The principal work engaging operating instrumentalities of the illustrated machine are a stationary anvil 22 (Figs. 1 and 6), an upper tensioning gripper 24, and a wiper 26 through which the fastenings are inserted, by mechanism to be described, into the work, the latter being manually presented to the machine in a position in which the anvil 22 engages the rear face or inner side of the lip of the insole I on the bottom of the last L over which the upper U is to :be tensioned by the gripper 24. The anvil 22, of course, is caused initially to engage and support that portion of the insole lip where the ilastening inserting operation is to begin, the operation being repeated and progressing along the lip, first at one side and then at the other side of the insole while the shoe is held in the operator's hands and is succesiyely moved or fed by him with relation to the machine to present different portions of the shoe successively to the source of power, the connections including an I operator controlled clutch (not shown) which, when maintained engaged, will continue to rotate the cam shaft and thus cause the machine to run through an indefinite number of cycles, one cycle corresponding to one complete revolution of thecam shaft.

The gripper mechanism of the: illustrated machine and the mechanism for operating and controlling it does not form a part of the present invention and hence need-not be described here. It is sufficient to say that the gripper, in its lowermostposition, is closeduporr the marginal portion of the upper and their iscaused to pull the upper upwardly and draw its marginal portion over the insole whereupon'the' gripper is opened and thereafter is again moved into its lowermost position in which another portion of the upper margin is seized by it.

The wiper head or throat member To wipe. each) portion of the upper U over. the insole feather and against the upstanding lipof the insole I after that portion of the upper has been tensioned by the gripper and is held ranged for reciprocatin g movement substantially in a horizonal path: into and out of engagement The with the shoe presented to the machine. wiper head 80 comprises a-main portion 82 (Figs; 3 and 4) which is provided at its right hand side (-as seen from the front of the machine) withacover plate 8% The wiper head is supported for movement toward and from the work ona front link 86 Gigs-.1 and 2) and a parallel back link 88, the two links having the same effective length. The upper ends of the links are pivotally connected to the wiper head 80. The lower end of the front link 86 is mounted to rotate freely on a rod 98 secured in the machine frame and the lower end of the back link 88 is mounted to rotate freely ona rod '92 secured in the machine frame. Pivotal connection between the upper end of the front link 86 and the wiper head 88 is established inthe following manner: Secured to the left hand side of the wiper head 80 is an outwardly and downwardly extending bracket 54 (Fig. 4') which carries a horizontal pin 96 extendingthrough a slot 98 provided in the upper end of the front link 86. Thus a lost motionis provided between the link 86 and the wiper head for purposes to be described. To actuate the wiper head there is provided a bell crank l'ever loo- (Flg. 2) which acts yieldingly on the front link 86 to advance the wiper head 80 toward the Work. One arm of the bell crank lever I00 carries a roll or cam follower I02 engaging a cam groove provided in one face of a cam disk I04. The just mentioned yielding operation of the link 86 by the bell orankltver M0 is accomplished in the following manner: There is provided in the front link 86 a socket I06 and a similar socket [.68 is provided in the upwardly extending arm of the bellv crank lever I00.

The two sockets are axially alined and house a spring H0 surrounding a headed bolt H2 extending from the front side of the link 8E through both sockets and through to the rear side of the upwardly extending arm of the bell crank lever I00 where it carries lock nuts bearing against said arm. As will be noted from an inspection of Fig. 2, movement or the bell crank member I88 in a counterclockwise direction will cause a yielding movement of the link 86 in the same direction to advance the Wiper head toward the work but movement of the bell crank member P60 ina clockwise direction will produce a positive movement of the link 86" the same direction for purposes to be described, this being due to the provision of the bolt H2 and the lock nuts carried by it.

It should be noted that, since the two links 88, 88 carrying the wiper head 80' have the same effective length, a parallel motion results. The rearward movement of the wiper head 88 which is producedby separate mechanism, to be described, is adju'stably determined by the following mechanism: The back link 88is provided with a tail piece iHl which has a socket [f6 carrying a screw IZll secured in place by a nut I22, the lower end.

of the screw on rearward movement of the wiper head flcb'eingadapted to engage an abutment l l8 provided on the'l'ower. portion of the machine frame- The illustrated machine is provided with; a wire feeding mechanism which is caused intermittent- 1y to. advance the wire strand through. the machine andinto a wire severing device. Thisv latter device serves to sever the leading end portion of the wire'from the wire strand and to transfer end of "the driver has a lateral fin- ZHlwhich ex the fastening thus produced into a fastening inserting position from. which it is inserted into the work parts by fastening driving mechanism.

The jastenmg' driving mechanism Forinsertingfastenings into the work presented The driver movable in and with relation to the wiper head 80 and, as will be described, it is guided and covered. all around and' over its entire length during the entirecourse' of its travel. The

driver 262 is movable in :a bar-shaped guiding member 26 of rectangular cross section which is 'seatedfiush in a longitudinal recess 2.63 (Figs. 3,

4 and 67 provided in the back face or inside face,

of the cover 84. The guidingmember 264 has extending along the exposed face thereof a groove which serves as the driver passage and which is covered or bridged over, as will be presently described. The driver 262 connected to a, driver bar 266' which is reciprocated in a longitudinal recess 2ST provided in-the main portion 82 of the wiper head. To hold the guiding member 26! in place there is provided astop pin 268 (Fig. 4') driven into the cover 80 and abutting the rear end of the guiding member 264. The driver 262 is secured to the driver'bar 286 as follows." The rear tends into a slot provided in one end of a pin 212 carried by thedriver bar 288. The rear end of the driver 262 is engaged by a hardened pin 214 also carried by the driver bar 266 and positioned in tangential relation to the pin 212. The pin 214 is provided with a ridge which extends into the groove of the guiding member 264 and engages the rear end of the driver. As illustrated in Figs. 2 and 4, there is pivotally connected to the rear end of the driver bar 286 a link 216 which in turn is connected to a driver actuating lever 218 arranged to swing about a fixed rod 288 and adapted to be rotated by a torsion spring 282 coiled about the hub of the lever 218, one end of the spring engaging a pin 284 on the actuating lever 218 and the other end engaging a pin 288 carried by the above described link 88 supporting the wiper head 88. The actuating lever 218 is adapted to be held in a cooked position, with the torsion spring 282 loaded, by the engagement of a lock ing pin 288 provided on the lever 218 with a latch 298 pivotally secured to the link 88 and having a depending arm 287, the lower end of which is connected by a link 284 to an arm 288 mounted for free rotation about the rod 288 and provided with an elongated hub 288 to the other end of which is secured a similar arm 382 (Fig. l) carrying a roll 388 adapted to be engaged by the high portion of a cam 388 on the cam shaft 28. As will be noted, the just described cam operated mechanism is adapted to release the actuating lever 218 to the force of the loaded spring 282 by tripping the latch 288. The fulcrum pin of the latch 288 has coiled about it a torsion spring 384 which tends to hold the latch 288 in its elevated lockingposition and against the resistance of which the latch is depressed by the above described cam operated mechanism. The latch 288 has a forwardly extending shelf 388 along which the pin 288 moves after the tripping of the latch on forward and rearward movement of the lever 218.

. The driver actuating lever 218 is connected to the above described bell crank lever I88, which serves to actuate the wiper head, by a link 3 I 8 the left hand end of which (Fig. 2) is pivotally secured to the upwardly extending arm of the bell crank lever I88 and the right hand end of which is provided with a slot 3I2 which is engaged by a pin 393 carried by the driver actuating lever 218. When the wiper head 88 is advanced by the counterclockwise rotation (Fig. 2) of the bell crank lever. I88 and the front link 88. the pin 95 carried by the wiper head 88 is located at the rear end of the slot 98 (Fig. 4) provided at the upper end of the link 86 so that the Wiper head 88 is pulled forwardly by the link 86, the link 88 swinging freely about its rod 92. In View of the link connection 3H2 between the bell crank lever I88 and the driver actuating lever 218 and, furthermore, due to the fact that, at that time, the pin 3I3 islocated at the rear end of the slot 3I2, th'e' driver actuating lever 218 is advanced with the wiper head, with the result that the wiper head 88 and the driver 2 62 are moved as a unit toward the work. It is to be noted that this advance of the driver and its actuating lever 218 takes place whilethe actuating lever 218 is held cocked by the latch 298 which, due to the fact that it is carried by the link 88, is advanced concomitantly with the lever 218. After the wiper head 88 has moved into engagement with the work and has wiped the upper into lasted relation to the insole, the high portion of the cam 386 becomes active, through roller 388, arms 382, 285 and link 294, to trip the latch 298 so as to release the actuating lever 218 to the loaded spring 282 which is of com siderable'strength. This results inthe operation of the driver which is moved'forwardlyin the guide member 284 to drive thefasteningpreviously transferred into the path of movement of .the driver. This movement of the driver, of. course, takes place with relation to thewiper head which is held stationary and in engagement with the work. The relative movement between the driver and the wiper head, after the latter has reached its. operative position, is possible .due to thepr0-' vision of the slot 3I2 in the link ,3I8, enabling the driver actuating lever 218 to be propelled forward ly by the spring 282 while the wiper actuating mechanism to which it is connected remains sta tionary. Reversely, when the bell crank lever I88 is rotated by its cam I84 in a clockwise direction, as viewed in Fig. 2, the wiper head 88 is not direct-. 1y affected by this moticn'of the bell crank lever I88, this being due to the lost motion provided between the front link88 and the wiper head by the slot 88. However, since the lost motion provided between the bell crank lever I88 and the driver actuating lever 218 by the slot 3! 2 has been taken up as a result of the driver operating forward movement of the lever 218 with relation to=the link 3I8 causing the pin M3 to move to the forward end of the slot 3I2, the driver actuating lever 218 is immediately moved backward 0n initiation of the above mentioned clockwise rotation of the bell crank lever 588. This backward movement of the lever 218 serves the purpose ofloading the torsion spring 282 and cooking the lever. 218. Since one end of the spring 282 bears against the rear link 88 supporting the wiper head 80, the reari link 88 also is swung rearwardly thereby retract-" ing the wiper head 88. As described, the rearward movement of the link 88 and the wiper head is terminated by the engagement ofthe screw :28 with the abutment H8, thus enabling the driver actuating lever 218 to move fully into its cocked position, it being understood that the slot 88 is of suflicient length to permit such movement of the lever 218', the bell crank lever I88 and the front link 88.

The operative movement of the driver is limited and the extent of this movement is adjustable by the provision of a rod 3M (Figs. 1 and 2) pivotally secured to the driver actuating lever 218 and extending through an aperture 3H5 provided in the link 88. The rod 3 M carries at its rear end a bumper 3I8 adjustably secured on the rod. The bumper, on operation of the driver, is adapted to strike against the rear face of the link 88, thus terminating the operative movement of the driver. forcing, due to the impact of the bumper 3I8 against the link 88, the wiper head 88 into intimate contact with the work while the fastening is inserted, i

It will be noted that as a result of the provision However, to insure nevertheless that the thin driver is fully supported in any position of its reciprocation, there is provided a movable guard member 338 (Figs. 3, 4 and 6) which has some what the shape of a long hatchet and is located in a recess provided in the main portion 82 of' the wiper head. The guard member 338 has a curved face located in close proximity to the complementary curved front end of the driver bar This has the additional advantage of,

gas-mam 26$ anctis: adapted to. cover: the. driver between the driverzbar' and the. front end: of: the. guiding. member 281-. The guard member 33.0.:ispivota11y secured; by" a. pin: 332a to. the wiper head. and has extending downwardlyand'. rearwardly' from. it. an. integral: arm; 3% which connectedby a link 36: (Fig; 2) to: the rear. end of the driver bar 265. Asa result, the guard: member 330' is caused, to swing: upwardly on. advance of the driver bar 2661 to: make room for the. drivebar whiie' con:- timiinm to cover the driver: in the diminishing. space. between. the: driver bar and". the front end or the guiding memberzfli. Reverse1y,.the guard member: is' caused. to swing: downwardly on retraction of the: driver bar 266; to. insure" complete coverageiof the driver. However, it wi11;benoted, particularly from an inspection of. Fig; 3, that movement" of theguard member about its pivot pin; 332: causes different portionsof that member to become active to cover the driver, and these diflerent. portions are located: different distances ironrthe center'of the'pivot pin 332. Consequently; the different: covering portions of the guard member 330: moveat difierent speeds: about the pivot pin: 332 during. the rotary motion of the gnard1member330; To offset this-factor, which is apt. to. result in exposing the driver at some time or other: duringitstravei, the above described arm 33Landiink 336 act as atoggie which,,upon ad Vance. of the. driver bar 2.66;. is moved toward a zero position; with the result that movement of the" guard member-isdecelerated, slowing down thez-coveringportions the distance between which and the. pin 33-2 increases at: that time. Reverse- 11mm: rearward. movement of the driver bar. 266, the: movement of the guard member is' acce1er-- atem.

Having: described my invention, what I claimas: new and'desiretosecure by Letters Patent: of the: United. States is:'.

1.. In: a fastening inserting machine;. a throat member adaptedto' engage a workpiece-presented to themachine,-, a. thin. driver' movable in the. throat'mem'ber'to; insert fastenings into the workpiece, a driver actuating member considerably thicker: than the driven. a. recesssh'r. the throat member in. which recessthe; driveractuating, member immovable; and: a. guard. membersecured. thither throat; member for? angular movement. so as to coversthat. POItiOIIsQf the driver whichis leedated: saidrecess=..

2:. In: a. fastening. inserting machine, a. throat member adaptedto engage aworkpiecerpresented tmthe: machine, a: thin driver. movable the:

throat memberrtot-insert fastenings into: thezworke piece;v a driver actuating member considerably thicker. than the driver,. recess: in the throat: member; in which recess; the driver: actuatin member is movable, andta guardmembermoumzedl for differential movement with regard" tothe driver and: adapted. to cover thatportion of the driver.- WhiChiS' located in said recess;

3;. In. a fastening: inserting machine, a threat member adapted to engage a .workpie'cepresented to:- the: machine, a thindriver movabi'e: inthe. throat. member totinsert fastenin-gsdntotiuewor-k'- piece, a: driver actuating memberconsiderably: thicker than. the driver, a; recess in the throat member, in. which. recesss the; driver. actuating. member. iszmovable, a. driver'guard pivotaily securedto thethroat member, and meanafor'operating the guard. during.- the. operation of thedriverto'cause-the guard-.tocover thatzportion oitheidr-iver. which. is locatedin saidrecess;

' 4. In a fastening inserting machine;. a: throat member: adapted to engage a. workpiece presented to the. machine, a. thin driver movable in. the throat member to insertfastenings'into thawork piece, a driver actuating member considerably thicker than. the driver, a recess in the; throat member, in; which. recess the driver actuating. member is movable; a movable guard member for covering that portion of the: driver. which. is located in. saidrec'ess, and. means for. moving the guard member; at: varying speeds: during. the. ac.- tuation of the driver.

5. In a fastening inserting machine, a: ttnioat member: adapted.- to engage a workpiece. presented to the machine; a; thin driver movable: in the throat: memberto insert fastenings into the work piece,. a driver actuating member considerably thicker than the driver, a recess in the throat member, in which recess thedriver actuating member is movablaa movable guard member: covering that portion of the driver which is located; in said: recess, and means for moving the: guard member at a, decreasing rate of speed dur-- ing forward movement of the driver in: the throat member and for moving the guard member at am increasing rate. of speed during retractingfmovcment' of the driver in the throat member.

6. In a fastening inserting machine having or throat member adapted to engage a workpiece presented to the machine, a thin. driver movable. in the throat member to insert fastenings into the. workpiece, a driver actuating: member considerably thicker than the driver, a recess in the throat member, in which recess the driver actuat ing member is movable, a movable guard member: for: covering that, portion of the driver which. is located. in. said recess, and connections betweem saidactuating. member and the guard member: adapted to movethe guard member at a decree-s ing: rate of. speed during: the operative stroke of the driver.

7; In a; fastening inserting machine-having. a throat member adapted to engage a: workpiecu presented: to the machine, a thin driver movable. in the throat. member to insert fastenings' into the workpiece: a driver actuating member considerably thicker than the driver, a recess in' the. throat. member,- in. which recess the driver actuating: member is movable, a pivoted guard. member as .sociated with. the throat member for covering that portion of the driver which is located: in said: recess, a toggle, connection between said actuatr-- ing member and the guard member for rotating, the: latter so thatdifierent portions of the guard".

1 member located different distanceszfrom the pivot.

thereof become active to cover the driver, the toggle connection being so' arranged that: the rate? of movement of the guard: member is varied'in. accordance with variations; of the distances 01: the: driver covering portions ofthe-guardmember. relatively to the pivot thereof as saidportions: are moved into'and out of driver covering posiion.

ROBERT H. LAWSON.

REFERENCES. CITED.

The following references are of record in the file. of this. patent:

UNITED STATES PATENTS Number 

